Concrete-block machine.



2 SHEETS-SHEET 1.

Patented Aug. 6, 1912.

M. WOHL.

CONCRETE BLOCK MACHINE.

APPLIUATION 11,111) mm: 27. 1911.

WIT/ 88158 M 1. g

M. WOHL.

CONGRETE BLOCK MACHINE.

APPLICATION FILED JUNE 27,1911.

1,034,854. Patented Aug. 6, 1912.

2 SHEETS-SHEET 2.

o 0 Q o o o o o o o o o o o o o o o 0' 0 O O WITNESSES %Y M momvs s.

INVENTOR UNITED STATES PATENT OFFICE.

MAX WOHL, OF JAMAICA, NEW YORK.

CONCRETE-BLOCK MACHINE.

To all whom 'it may concern:

Be it known that I, MAX VVoHL, a citizen of the United States, andresiding at Jamaica, Long Island, in the county of Queens and State ofNew York, have invented certain new and useful Improvements inConcrete-Block Machines, of which the following is a specification, suchas .will enable those skilled in the art to which it appertains to makeand use the same.

This invention relates to concrete building blocks, and the objectthereof is to provide a building block of this class one face of whichis preferably composed of finer material than the body of the block andwhile being interlocked therewith is separated therefrom by a waterprooffibrous sheet whereby moisture cannot pass through the face of the blockin the body thereof; and the invention also involves a block moldingapparatus constructed as hereinafter described and claimed.

The invention is fully disclosed in the following specification, ofwhich the accompanying drawing forms a part, in .which the separateparts of my improvement are designated by suitable reference charactersin each of the views, and in which Figure l is a sectional side view ofthe block molding apparatus which I employ, the section being on theline 11 of Fig. 2; Fig. 2 a plan view of said apparatus with part of theconstruction broken away; Fig. 3 a cross section on the line 3-3 of Fig.1; Fig. 3 a side view of a concrete block made according to my inventionand showing the same on a follower plate which forms part of theapparatus and which is also shown in Figs. 1 and 3; Fig. 4 a side viewof a device which I employ for connecting the facing of the buildingblock with the body portion thereof; Fig. 5 a bottom view of said deviceand showing a sheet of waterproof material in connect-ion therewith, andFig. 6 a plan view of one of my improved building blocks.

In the practice of my invention, I provide a table or other suitablesupport a, on which is secured transversely thereof and at two differentpoints, longitudinally thereof, two pairs of supports 5, each pair ofsaid supports consisting of two upright members 5 between which arespaces 5 and said supports are formed on base plates b. Each transversepair of supports 6 is provided with a crosshead b, which is securedthereto Specification of Letters Patent.

Application filed June 27, 1911.

Patented Aug. 6, 1912.

Serial No. 635,584.

in any desired manner, and placed on the crossheads b is a plate 0, onwhich is placed the follower plate d. I also provide a box e composed ofend members 6 and side members c and the end members 6 are reinforcedatthe top and bottom by cross bars (2, and the side, members 6 arereinforced at the top and bottom by longitudinal bars 0 and the top bars6 are extended at their ends as shown at 6 and provided with cross bars6 which form handles by which the box 0 may be manipulated ashereinafter described. The bottom of the box e is also provided withequally spaced longitudinal bars 6 which are secured to the ends of saidbox and which pass between the said upright members b of the pairs ofupright supports 1) which are secured to the table a, and placed betweenthe bars 6 and secured thereto are upright cores or core boxes f,

said cores or core boxes being equally spaced longitudinally of the box6, and supplemental cores or core boxes are also secured to the bars ein the same manner as the cross or core boxes 7, and on the inner sideof the end members 6 of the box e, and the supplemental cores or coreboxes f may also be secured to the end members 6 of the box 6 ifdesired, and said supplemental cores or core boxes f are approximatelyone-half of the transverse dimensions of the cores or core boxes f, butin the form of construction shown the central core or core box 7' is ofless transverse dimensions than the cores or core boxes on the oppositesides thereof, but this construction is not essential and all of saidcores or core boxes f may be of the same transverse dimensions ifdesired.

The cores or core boxes 7 and the supplemental cores or core boxes fpass through corresponding apertures c in the plate 0, and the followerplate d which is removable is provided with corresponding apertures 03through which said cores or core boxes and said supplemental cores orcore boxes also pass.

The box e is provided on the inner surface of the back side member 6thereof with vertical ribs 9 which are secured thereto or connectedtherewith in any desired manner, and said ribs are preferably under-cuton their opposite sides, and the follower plate cl is provided in thecorresponding side edge thereof with corresponding recesses d throughwhich the ribs 9 pass, and the ribs 9 also pass through correspondingrecesses in the corresponding side edge of the plate 0 and said ribs 9form corresponding s aces 9 the ribs 9 and spaces 9 being 0 the tongueand groove type.

The inner face of the front side of the box 6 is provided withvertically arranged ribs 9 and corresponding spaces 9*, said ribs andspaces in horizontal section being of the ogee form, and it will beunderstood that the front side of the follower plate d and the frantside edge of the plate 0 are similarly formed.

I also provide arms h which are pivotally connected at k with plates 7Lsecured to the table a and the free ends of said arms are provided withheads h having recesses h, and said arms are designed to hold the box 6in its elevated position as shown in Fig. 1, or may be turned outwardlyto permit said box to drop into the position shown in dotted lines inFig. 1, when desired, or in the operation of the device as hereinafterdescribed.

In the use of this device, the box 6 is dropped down over the supports1), and the cross heads secured thereto, and the plate 0 secured to saidcrossheads, and the follower plate d is placed in the box 6 and rests onthe plate 0, and when the device is not in use the box 6 rests on thebase plates 1) of the supports 6.

I also provide a device for separating the front face of the block fromthe body thereof and for inserting a water-proof sheet between saidparts, and by means of which said parts may be interlocked in theformation of the block, and for the purposes of this description thisdevice will be called the interlocker, and is shown at k in Figs. 4 and5, and consists of a crosshead portion k having a central raised handlemember and to the opposite sides of which are secured parallel rows ofalternately arranged and projecting tongues la said tongues being of thesame depth as the mold box and adapted to rest thereon, and inconnection with this device, I employ a sheet 73 of oiled paper, tarpaper or other Waterproof fibrous material which is woven back and forthbetween the tongues lc and the width of which is the same as the lengthof said tongues and preferably the same as the depth of the block to beproduced. The end portions 6 of the mold box are provided adjacent tothe front side thereof with vertically arranged cleats is adapted toreceive the end tongues is of the interlocker 7c and to hold said interlocker in proper position during the process of filling the mold boxwith the material from which the block is to be made.

When it is desired to use this apparatus, the interlocker [c with thewaterproof sheet 70 interwoven between the tongues is thereof isinserted into the mold box as shown in Figs. 1, 2 and 3, and said box israised into the position shown in full lines in Fig. 1, and the arms hare turned into the position also shown in said figure so as to supportsaid box in its elevated position. The interlocker lc divides the moldbox into a large back portion and a small front portion and with thesaid box in its elevated position the concrete 2' from which the body ofthe block is to be formed, said concrete being in a plastic orsemi-liquid state, is poured into the back portion of the box in theusual manner until said back portion of the box is full, and at the sametime the finer concrete or cement 2' from which the face of the block isto be formed is poured into the front portion of said box, and duringboth of these operations the concrete back of the interlocker and theconcrete in front of the interlocker are tamped firmly by means ofsuitable tamping devices into the spaces formed by the tongues 7c of theinterlocker and when both parts of the mold box are full the interlockeris withdrawn, leaving the waterproof sheet 7: in position, and afterthis, that part of the concrete in the front of the mold box includingthe face 2' is again thoroughly tamped or packed and additional materialmay be put in to fill up and when the block has been formed in thismanner, the face thereof will be interlocked by means of a tongue andgroove connection with the body of the block and at the same time, saidface will be separated from the body of the block by the waterproofsheet k After the box has been filled in this manner a straight edge orsimilar device is passed over the top surface of the block smooth andafter the concrete or concrete and cement have had time to set the armsh are turned outwardly and the box e lowered into the position shown indotted lines in Fig. 1, in which po sition of the box e the followerplate d will be flush with the top of the box and may be turnedtransversely thereof while resting thereon, and in this operation theblock of concrete is also turned with the follower plate and may beremoved on said plate to any suit-able or predetermined point andallowed to dry or to be kiln dried in the usual manner. It will beunderstood that any desired number of follower plates d may be employed,and after the first block 2' has been completed the parts of the deviceare again moved to the position shown in full lines in Fig. 1 andanother block cast or molded, and this operation may be repeated asoften as desired.

Although, I have shown and described the back side or face of the blockas provided with ribs and grooves of the tongue and groove class and thefront face thereof with ribs and grooves of the ogee type the mold boxbeing formed so as to produce this rethereof to make the top I sult, itwill be understood that this construction is not essential and the frontand back faces of my improved building block may be given any desiredshape or configuration, it being understood that the tongue and grooveconstruction on the back face of said block is intended to enable saidblock to hold cement in the operation of building a wall, while the riband groove construction on the front face of said block is intended asornamentation.

It will be understood that various changes in the apparatus herein shownand described, as well as changes in the form of the block producedthereby may be made, within the scope of the appended claims, withoutdeparting from the spirit of my invention or sacrificing its advantages,the chief fea ture of my invention being a building block having oneface portion separated from the body of the block by waterproof materialso as to prevent the body of the block from being saturated withmoisture under any conditions, said face portion being preferablycomposed of finer material than the body of the block whereby a finerfinish may be produced, another feature being the formation of aconcrete building block with a facing of different material interlockedin connection therewith, together with the apparatus for molding orforming such block or blocks.

The brick or block described herein and shown in Fig. 6 of the drawingis not claimed in this application but is made the subject of adivisional application filed Nov. 15, 1911, Serial No. 660,369.

Having fully described my invention what I claim as new and desire tosecure by Letters Patent, is

1. In a machine for molding concrete blocks one face portion of which isformed separately from and interlocked in connection with the body ofthe block, a mold box and a hand-operated interlocking device adapted tobe inserted thereinto, said device consisting of a cross head ofapproximately the length of the box having projecting tonguesalternately secured to the opposite sides thereof and adapted to receivea sheet of fibrous material to be interwoven therebetween.

2. In a machine for molding concrete blocks, one face portion of whichis formed separately from and interlocked in connection with the body ofthe block. a mold box and a hand-operated interlocking device adapted tobe inserted thereinto, said device consisting of a cross head portion ofapproximately the length of the mold box and provided with projectingtongues alternately secured to the opposite sides thereof and adapted toreceive a sheet of fibrous material interwoven therebetween, saidinterlocking device being adapted to be removed from the box in theoperation of molding the block in which operation of removal the fibroussheet is left in the block.

3. In a machine for molding concrete blocks one face portion of which isformed separately from and interlocked in connection with the body ofthe block. a mold box and a hand-operated interlocking device adapted tobe inserted thereinto, said device being of approximately the length ofthe box and comprising a cross head portion having projecting tonguesalternately secured to the opposite sides thereof and involving the useof a sheet of fibrous material interwoven therebetween so as to form atongue and groove construction, said cross head portion and the tonguesthereof being adapted to be removed from the box in the operation ofmolding a block in which operati on of removal the fibrous sheet is leftin the block.

In testimony that I claim the foregoing as my invention I have signed myname in presence of the subscribing witnesses this 26th day of June1911.

MAX \VOHL.

IVitnesses C. E. MULREANY, FRANK G. AT LEE.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents. Washington, D. C.

